3.2 Es'mate Products
Page 188
Thursday, September 25, 14
Essen'al Ques'on
• How do you determine which place value to use when es'ma'ng products?
Common Core Standards
• 6.NS.3
Thursday, September 25, 14
Es'ma'ng using Rounding
Thursday, September 25, 14
Es'ma'ng using Rounding
Rounding
Thursday, September 25, 14
Es'ma'ng using Rounding
Rounding
1. Underline the digit to be rounded.
Thursday, September 25, 14
Es'ma'ng using Rounding
Rounding
1. Underline the digit to be rounded.
2. Look at the digit to the right of place being rounded.
–
–
–
If the digit is 4 or less, the underline digit remains the same.
If the digit is 5 or greater, the underline digit goes up by 1.
AOer rounding, all places values to the right of the underline digit and leO the decimal point have a value of zero.
Thursday, September 25, 14
Es'ma'ng using Rounding
Rounding
1. Underline the digit to be rounded.
2. Look at the digit to the right of place being rounded.
–
–
–
If the digit is 4 or less, the underline digit remains the same.
If the digit is 5 or greater, the underline digit goes up by 1.
AOer rounding, all places values to the right of the underline digit and leO the decimal point have a value of zero.
• Mul'ply
Thursday, September 25, 14
Es'mate each Product
1. 5.8 x 4 ≈
Thursday, September 25, 14
Es'mate each Product
1. 5.8 x 4 ≈
5.8
X 4
Thursday, September 25, 14
Es'mate each Product
1. 5.8 x 4 ≈
5.8
X 4
Thursday, September 25, 14
Es'mate each Product
1. 5.8 x 4 ≈
5.8
X 4
Thursday, September 25, 14
Es'mate each Product
1. 5.8 x 4 ≈
5.8
X 4
Thursday, September 25, 14
6
X 4
Es'mate each Product
1. 5.8 x 4 ≈
5.8
X 4
Thursday, September 25, 14
6
X 4
24
Es'mate each Product
2. 13.92 x 2.7 ≈
Thursday, September 25, 14
Es'mate each Product
2. 13.92 x 2.7 ≈
13.92
X 2.7
Thursday, September 25, 14
Es'mate each Product
2. 13.92 x 2.7 ≈
13.92
X 2.7
Thursday, September 25, 14
Es'mate each Product
2. 13.92 x 2.7 ≈
13.92
X 2.7
Thursday, September 25, 14
Es'mate each Product
2. 13.92 x 2.7 ≈
13.92
X 2.7
Thursday, September 25, 14
Es'mate each Product
2. 13.92 x 2.7 ≈
13.92
X 2.7
Thursday, September 25, 14
Es'mate each Product
2. 13.92 x 2.7 ≈
13.92
X 2.7
Thursday, September 25, 14
10
X3
Es'mate each Product
2. 13.92 x 2.7 ≈
13.92
X 2.7
Thursday, September 25, 14
10
X3
30
Es'mate each Product
3. 94.89 x 3.11 ≈
Thursday, September 25, 14
Es'mate each Product
3. 94.89 x 3.11 ≈
94.89
X 3.11
Thursday, September 25, 14
Es'mate each Product
3. 94.89 x 3.11 ≈
94.89
X 3.11
Thursday, September 25, 14
Es'mate each Product
3. 94.89 x 3.11 ≈
94.89
X 3.11
Thursday, September 25, 14
Es'mate each Product
3. 94.89 x 3.11 ≈
94.89
X 3.11
Thursday, September 25, 14
Es'mate each Product
3. 94.89 x 3.11 ≈
94.89
X 3.11
Thursday, September 25, 14
Es'mate each Product
3. 94.89 x 3.11 ≈
94.89
X 3.11
Thursday, September 25, 14
90
X3
Es'mate each Product
3. 94.89 x 3.11 ≈
94.89
X 3.11
Thursday, September 25, 14
90
X3
270
Financial Literacy
4. A grocery store sells American cheese for $3.89 per pound. About how much would 1.89 pounds of the cheese cost?
Thursday, September 25, 14
Financial Literacy
4. A grocery store sells American cheese for $3.89 per pound. About how much would 1.89 pounds of the cheese cost?
3.89
X 1.89
Thursday, September 25, 14
Financial Literacy
4. A grocery store sells American cheese for $3.89 per pound. About how much would 1.89 pounds of the cheese cost?
3.89
X 1.89
Thursday, September 25, 14
Financial Literacy
4. A grocery store sells American cheese for $3.89 per pound. About how much would 1.89 pounds of the cheese cost?
3.89
X 1.89
Thursday, September 25, 14
Financial Literacy
4. A grocery store sells American cheese for $3.89 per pound. About how much would 1.89 pounds of the cheese cost?
3.89
X 1.89
Thursday, September 25, 14
Financial Literacy
4. A grocery store sells American cheese for $3.89 per pound. About how much would 1.89 pounds of the cheese cost?
3.89
X 1.89
Thursday, September 25, 14
Financial Literacy
4. A grocery store sells American cheese for $3.89 per pound. About how much would 1.89 pounds of the cheese cost?
3.89
X 1.89
Thursday, September 25, 14
4
X2
Financial Literacy
4. A grocery store sells American cheese for $3.89 per pound. About how much would 1.89 pounds of the cheese cost?
3.89
X 1.89
4
X2
8
Thursday, September 25, 14
Word Problem
5. Greg has 52 megabytes leO on his MP3 player. He wants to download 7 songs that each use 7.9 megabytes of memory. He es'mates that he will need 56 megabytes of memory. Is his es'mate is reasonable? Explain your reasoning.
Thursday, September 25, 14
Word Problem
5. Greg has 52 megabytes leO on his MP3 player. He wants to download 7 songs that each use 7.9 megabytes of memory. He es'mates that he will need 56 megabytes of memory. Is his es'mate is reasonable? Explain your reasoning.
7.9
Thursday, September 25, 14
Word Problem
5. Greg has 52 megabytes leO on his MP3 player. He wants to download 7 songs that each use 7.9 megabytes of memory. He es'mates that he will need 56 megabytes of memory. Is his es'mate is reasonable? Explain your reasoning.
7.9
Thursday, September 25, 14
Word Problem
5. Greg has 52 megabytes leO on his MP3 player. He wants to download 7 songs that each use 7.9 megabytes of memory. He es'mates that he will need 56 megabytes of memory. Is his es'mate is reasonable? Explain your reasoning.
7.9
Thursday, September 25, 14
Word Problem
5. Greg has 52 megabytes leO on his MP3 player. He wants to download 7 songs that each use 7.9 megabytes of memory. He es'mates that he will need 56 megabytes of memory. Is his es'mate is reasonable? Explain your reasoning.
7.9 ≈8
Thursday, September 25, 14
Word Problem
5. Greg has 52 megabytes leO on his MP3 player. He wants to download 7 songs that each use 7.9 megabytes of memory. He es'mates that he will need 56 megabytes of memory. Is his es'mate is reasonable? Explain your reasoning.
7x8=
7.9 ≈8
Thursday, September 25, 14
Word Problem
5. Greg has 52 megabytes leO on his MP3 player. He wants to download 7 songs that each use 7.9 megabytes of memory. He es'mates that he will need 56 megabytes of memory. Is his es'mate is reasonable? Explain your reasoning.
7 x 8 = 56
7.9 ≈8
Thursday, September 25, 14
Word Problem
5. Greg has 52 megabytes leO on his MP3 player. He wants to download 7 songs that each use 7.9 megabytes of memory. He es'mates that he will need 56 megabytes of memory. Is his es'mate is reasonable? Explain your reasoning.
7 x 8 = 56
7.9 ≈8
Yes, he estimated right and does not have
enough space because 7 times 8 is 56.
Thursday, September 25, 14
Building on the Essen'al Ques'on
6. How do you determine which place value to use when es'ma'ng products?
Thursday, September 25, 14
Building on the Essen'al Ques'on
6. How do you determine which place value to use when es'ma'ng products?
If you estimate to the largest place value, the multiplication is
easier. It is very easy to multiply by 0, but if you estimate to the
smallest place value, the answer will be more accurate.
Thursday, September 25, 14
Summarize
• Make sure to do the summarize sec'on. Thursday, September 25, 14
Rate Yourself
• How confident are you about es'ma'ng products? Check the box that applies.
Thursday, September 25, 14